Improvement in tanks tor rendering lard



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N-PETERS. PHOTD-LITHOGHAPHE| WASHINGYON, D C.

dtcted @Statua @strat @Mitica Letters Patent No. 100,063, dated February 22, 1870.

IMPROVEMENT IN TANKS FOR RENDERING LARD.

The Schedule referred to in these Letters Patent and making part of the same.

To all lwhom, it may concern 'Be it known that I, DAVID PINGER, of St. Joseph, in the county of Buchanan, and State of Missouri, have made certain new and useful Improvements in Tanks for Rendering Lard and Similar Matter; and do hereby declare the following to be a full and true description thereof, reference being had to the accompanying drawings and to the letters of reference marked thereon.

It is known that in the use of rendering and similar vessels there is a gradual accumulation of refuse matter therein, which it becomes necessary to discharge. 1n the ordinary form of such tanks as now iu use, it is necessary to enter the same to effect a satisfactory audsutiicient cleansing thereof, and owing to the delay occasioned in awaiting the condensation of the steam and the cooling of the tank stuffs, workmen are compelled to enter said tanks while the same are still greatly heated and charged with steam.

'lo avoid said disznlvantages, and generally' to form an improved tank for use as aforesaid, this invention relates to constructing a conical or similar inclined bottom or base in connection with the usual cylindrical tank-body, and said invention relates also to the adaptation of a properI lid or cap at the base of the cone or inclined hopper-shaped end to cover the etiluent or discharge-opeiring. Lastly, said invention relates to the manner of arranging the usual steampipe in said tank, so that the distribution of steam and heat shall be uniform, by carrying said steam-pipe to the lower end of the hopper base, all of which will hereinafter more fully appear.

To enable those skilled in these arts to make and use my said improved tank, I will now more fully describe the same, referring herein to the accompanying Figure 1 as a sectional elevation, and to Figure 2 as a sectional plan of a rendering-vessel in one of its ordinary forms.

I form my said vessel of the usual cylindrical shell A, and in the usual manner.

This has a proper top plate, B, in which the blowoli` valves and a man-hole will be arranged in the usual manner.

With the shell A is connected the conical base C, and this has at its bottom the seat-plate c, against which thel cap D rests.

All parts are joined by rivets or bolts or packing material in a steam-tight manner.

In order to hold the cap D up to its seat-plate rmly, and, at the saine time, to form a strong connection between the base and top plate of the tank, a bolt-rod, E, is arranged, passing the cap-plate D with a suitable nut or head, e, and extending through the top plate B.

When said rod passes the top plate, a reinforcingplate, C, may be used, and a nut, el, will then draw up tightly on the outer ange of the plate B, thus causing the rod E to act by its tension vas a connecting-bar between the tank-ends, as aforesaid.

Beyond the thread needed for the nut el, the rod E is out down to smaller diameter and ends in a hook, e2.

In cleansing the tank it is .then necessary only to release the nut c1 of its bearing, when the'rod E and cap D will drop down as far as may be necessary to discharge the tank-stuff at the efduent opening formed by the bore ofthe seat-plate c.

The interior of the tank may be then subjected to a more perfect cleansing by a suitable hose and water, and thereupon by drawing up the rod E, (by block and tackle or other hoisting apparatus, attaching to the liook e2) the steam-tight connection of all parts may again be restored.

Y lo admit steam, as is necessary in the usual rendering process, a suitable flange and joint-casting is at-v tached to the shell A, and the steam-pipe F connecting therewith is placed to rest on the base C, so as to discharge at the base of the tank at the point of its least area. The steam will, therefore, in rising, distribute over the entire section of the vessel A in a. uniform maner.

By thus introducing steam near the apex of the cone base, the proper distribution vis effected without the usual perforated coils of pipe and perforated false bottoms, which in themselves are an impediment, greatly increasing the labor of cleansing the ordinary tanks. The usual draw-off cocks and valves are placed on the tank as ordinarily, so as to rack olf the lard or other substance, a further description of th'ese devices not being deemed necessary, since my said vessel does not,

in its usual application, diier herein from those in or- In testimony whereof, I have hereunto set my hand I in the presence of- DAVID PINGER. Iitnesses W. M. DIXON, W. B. JOHNSON. 

